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Letters Patent No. 97,419, dated Nocember 30, 1869.

PHOTOGRAPHIC Il?RINTIN'G-APPAIRATUS.

The Schedulereferred to in. these Letters Patent-and making part of the same.

To all whom it may concern:

Be it known that I, L. J. MARCY, of Newport, in the county of Newport, and State of Rhode Island, have invented a new and improved Photographic Printing-Apparatus; and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference'v being h ad to the accompanying drawings, forming part of this specication, in which- Figure 1 represents a verticallongitudinalsection of my improved photographic print-ing-apparatus.V

' Figure 2 is an end elevation of the same.

Figure 3 is a plan orv top view of the lamp arranged therein.

Similar letters of reference indicate corresponding parts.

IThis invention relates to a new .instrument for printing photographic pictures, or, more particularly, transparencies, by the aid of artificial iight. Such plates are used as slides for magic-lanterns and other purposes.

The invention consists of a lamp of novel construetion, placed intoa `flame o r case, so that the light will be projected toward the negative through a narrow aperture of the case.

The invention consists, also, inthe genelalarxangement and construction of the aforesaid case or frame. A, in thedrawng, represents the lamp used in my improved printing-apparatus.'

' This lamp is made of sheet-metal or other suitable material, of suitable form and size, and is provided with a wick-tube, c, of comparatively great width, so

dated in the same.

The wick-tube is slightly curved, as shown in tig. 3; so that'the flame will be'broader than the mere tbickness f the wick, for the purpose of avoiding the shadow -always seen at the edge of a. dat flame. I

To the sides of the lampv are secured outward-pro jectng inclined perforated plates b b, which serve to break the air-currents, and to thereby produce a steady ilame. l

that a wick about fourinches wide can be accommo- This lamp A is placed within a s heetfmetal or other l case, B, whicll'is of suitable form, preferably but little longer than the lamp.

Directly above the wick-tube of the lamp is arranged, across the case B, a horizontal diaphragm, c, which is slotted, to allow the wick to pass through it. The slot is curved similar to thel wick-tube.

Both or one of the ends of the case, B, are provided with apertures7 adapted to receive perforated slides O O, rlhe aperture iu each slide is as large as.

required for every particular case, but should not be -wider than the thickness of the Adame, so that 'a solidA column of light will be behind it. The rays of light are projected through the perfo rated slide upon a negative, D, which is placed in front of the plate E, that is to receive the impression.

The plates D E are secured in a suitable frame, F,

'through the negative in almost parallel direction.

The copy will, consequently, be as clear, for all practical purposes, as one produced by ordinary light, with direct contact.

The extent of the illuminated portion of the negative is regulated partly by the distance of the lamp from the negative, partly by the size of' the aperture in the slide. The slide is, therefore, made removable,

so that'. another, with a ditierenbsized aperture, may

be put in its place.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- 1. A photographic printing-apparatus, consisting of a lamp and printing-frame, arranged and operating together substantially as described.

2. The lamp A, provided with a curved wick-tube, substantially as andfor the purpose described.

3. The case B of the lamp, when provided with a slotted diaphragm, substantially as herein shown and described. n 4. The inclined perforated plate-s b b, formed on the lamp, for the purpose of steadying the flame, as set forth.

5. Thechangeable perforated slides C, or their equivalent, arranged and operating substantially as and for the purpose herein' 'shown'and described.

6. lbe printing-frame F, made substantially as described, to carry the ngative and the sensitive plate, as described.

L. J. MAROY.

Witnesses:

Trios. T. CARR, BENJAMIN MARSH, 2d. 

